package com.warrantyhotel.android.widget;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.util.FloatMath;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;

import com.warrantyhotel.android.R;

/**
 * Wrapper around AlertDialog for choosing edit image method
 * 
 */
public class TakeImageDialogWithImage implements OnTouchListener {

	private static final String TAG = "Touch";
	// These matrices will be used to move and zoom image
	Matrix matrix = new Matrix();
	Matrix savedMatrix = new Matrix();

	// We can be in one of these 3 states
	static final int NONE = 0;
	static final int DRAG = 1;
	static final int ZOOM = 2;
	int mode = NONE;

	// Remember some things for zooming
	PointF start = new PointF();
	PointF mid = new PointF();
	float oldDist = 1f;

	private final AlertDialog dialog;

	/**
	 * 
	 * @param activity
	 * @param takeNewPhoto
	 * @param useCurrentImage
	 */

	public TakeImageDialogWithImage(final Activity activity, final Bitmap bitmap, final Runnable takeNewPhoto,
			final Runnable useCurrentImage) {
		dialog = makeDialog(activity, bitmap, takeNewPhoto, useCurrentImage);
	}

	/**
	 * Creates AlertDialog with specific layout
	 * 
	 * @param activity
	 * @param takeNewPhoto
	 * @param useCurrentImage
	 * @return
	 */

	private AlertDialog makeDialog(final Activity activity, final Bitmap bitmap, final Runnable takeNewPhoto,
			final Runnable useCurrentImage) {
		final AlertDialog.Builder builder = new Builder(activity);
//		builder.setIcon(R.drawable.icon_warranty);
//		builder.setTitle(R.string.choose_variant);

		// layout
		final LayoutInflater inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		final View layout = inflater.inflate(R.layout.edit_image_dialog_with_image,
				(ViewGroup) activity.findViewById(R.id.layout_root1));
		builder.setView(layout);

		// cancel button
		// builder.setNegativeButton(android.R.string.cancel, null);

		return setupDialog(builder.create(), bitmap, layout, takeNewPhoto, useCurrentImage);
	}

	/**
	 * Setups buttons and actions to dialog
	 * 
	 * @param dialog
	 * @param layout
	 * @param takeNewPhoto
	 * @param useCurrentImage
	 * @return
	 */

	private AlertDialog setupDialog(final AlertDialog dialog, final Bitmap bitmap, final View layout,
			final Runnable takeNewPhoto, final Runnable useCurrentImage) {
		final Button takeNewPhotoButton = (Button) layout.findViewById(R.id.take_new_photo_button);
		takeNewPhotoButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(final View v) {
				// DialogUtil.dismiss(dialog);
				dialog.dismiss();
				takeNewPhoto.run();
			}
		});

		final Button useCurrentImageButton = (Button) layout.findViewById(R.id.use_current_image_button);
		useCurrentImageButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(final View v) {
				// DialogUtil.dismiss(dialog);
				dialog.dismiss();
				useCurrentImage.run();
			}
		});
		final ImageView imageView = (ImageView) layout.findViewById(R.id.current_image);
		imageView.setImageBitmap(bitmap);
		imageView.setOnTouchListener(this);

		return dialog;
	}

	/**
	 * Shows dialog
	 */
	public void show() {
		dialog.show();
	}

	@Override
	public boolean onTouch(View v, MotionEvent event) {
		ImageView view = (ImageView) v;

		// Dump touch event to log
		dumpEvent(event);

		// Handle touch events here...
		switch (event.getAction() & MotionEvent.ACTION_MASK) {
		case MotionEvent.ACTION_DOWN:
			savedMatrix.set(matrix);
			start.set(event.getX(), event.getY());
			Log.d(TAG, "mode=DRAG");
			mode = DRAG;
			break;
		case MotionEvent.ACTION_POINTER_DOWN:
			oldDist = spacing(event);
			Log.d(TAG, "oldDist=" + oldDist);
			if (oldDist > 10f) {
				savedMatrix.set(matrix);
				midPoint(mid, event);
				mode = ZOOM;
				Log.d(TAG, "mode=ZOOM");
			}
			break;
		case MotionEvent.ACTION_UP:
		case MotionEvent.ACTION_POINTER_UP:
			mode = NONE;
			Log.d(TAG, "mode=NONE");
			break;
		case MotionEvent.ACTION_MOVE:
			if (mode == DRAG) {
				// ...
				matrix.set(savedMatrix);
				matrix.postTranslate(event.getX() - start.x, event.getY() - start.y);
			} else if (mode == ZOOM) {
				float newDist = spacing(event);
				Log.d(TAG, "newDist=" + newDist);
				if (newDist > 10f) {
					matrix.set(savedMatrix);
					float scale = newDist / oldDist;
					matrix.postScale(scale, scale, mid.x, mid.y);
				}
			}
			break;
		}

		view.setImageMatrix(matrix);
		return true; // indicate event was handled
	}

	/** Show an event in the LogCat view, for debugging */
	private void dumpEvent(MotionEvent event) {
		String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE", "POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
		StringBuilder sb = new StringBuilder();
		int action = event.getAction();
		int actionCode = action & MotionEvent.ACTION_MASK;
		sb.append("event ACTION_").append(names[actionCode]);
		if (actionCode == MotionEvent.ACTION_POINTER_DOWN || actionCode == MotionEvent.ACTION_POINTER_UP) {
			sb.append("(pid ").append(action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
			sb.append(")");
		}
		sb.append("[");
		for (int i = 0; i < event.getPointerCount(); i++) {
			sb.append("#").append(i);
			sb.append("(pid ").append(event.getPointerId(i));
			sb.append(")=").append((int) event.getX(i));
			sb.append(",").append((int) event.getY(i));
			if (i + 1 < event.getPointerCount())
				sb.append(";");
		}
		sb.append("]");
		Log.d(TAG, sb.toString());
	}

	/** Determine the space between the first two fingers */
	private float spacing(MotionEvent event) {
		float x = event.getX(0) - event.getX(1);
		float y = event.getY(0) - event.getY(1);
		return FloatMath.sqrt(x * x + y * y);
	}

	/** Calculate the mid point of the first two fingers */
	private void midPoint(PointF point, MotionEvent event) {
		float x = event.getX(0) + event.getX(1);
		float y = event.getY(0) + event.getY(1);
		point.set(x / 2, y / 2);
	}
}
